Skip to Main Content
ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
Search for other works by this author on:
ASM International
Volume
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Solvent-Induced Cracking Failure of Polycarbonate Ophthalmic Lenses

By
Edward C. Lochanski
Edward C. Lochanski
Metalmax, Inc.
Search for other works by this author on:
Published:
1993
Page range:
493 - 494

Abstract

Metal-framed polycarbonate (PC) ophthalmic lenses shattered from acetone solvent-induced cracking. The lenses exhibited primary and secondary cracks with solvent swelling and crazing. A laboratory accident splashed acetone onto the lenses. The metal frames gripped approximately two-thirds of the lenses' periphery and introduced an unevenly distributed force on the lenses. To prevent future failures, it was recommended to protect PC from service environments with solvents, such as acetone; or from marking pens, adhesives or soaps which contain undesirable solvents; and to not apply excessive stress on ophthalmic lenses in the form of working or residual stresses.

You do not currently have access to this content.
Don't already have an account? Register

Edward C. Lochanski, 1993. "Solvent-Induced Cracking Failure of Polycarbonate Ophthalmic Lenses", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

Download citation file:


Close
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal